Move static member functions next{Previous,Next}Offset() and uncheckedPreviousOffsetForBackwardDelet

Source/core/editing/Position.h

Index: Source/core/editing/Position.h
diff --git a/Source/core/editing/Position.h b/Source/core/editing/Position.h
index d0f15997a9c45d9c9d219690e0b1e3e896f3b871..994ef68b457ec9e0eb790a16bc6471d961e7ecf5 100644
--- a/Source/core/editing/Position.h
+++ b/Source/core/editing/Position.h
@@ -170,9 +170,6 @@ public:
     // using composed characters, the result may be inside a single user-visible character if a ligature is formed.
     PositionAlgorithm<Strategy> previous(PositionMoveType = CodePoint) const;
     PositionAlgorithm<Strategy> next(PositionMoveType = CodePoint) const;
-    static int uncheckedPreviousOffset(const Node*, int current);
-    static int uncheckedPreviousOffsetForBackwardDeletion(const Node*, int current);
-    static int uncheckedNextOffset(const Node*, int current);
 
     int compareTo(const PositionAlgorithm<Strategy>&) const;
 
@@ -448,6 +445,9 @@ inline PositionInComposedTree fromPositionInDOMTree<EditingInComposedTreeStrateg
 // to "VisibleUnits.cpp" to reduce |LayoutObject| dependency in "Position.cpp"
 bool hasRenderedNonAnonymousDescendantsWithHeight(LayoutObject*);
 
+CORE_EXPORT int uncheckedPreviousOffset(const Node*, int current);
+CORE_EXPORT int uncheckedNextOffset(const Node*, int current);
+
 } // namespace blink
 
 #ifndef NDEBUG